Preheat oven to 350 degrees. Grease 13 x 9 x 2 in. Pan. Combine brownie mix, 3/4 cup evaporated milk, oil and eggs. Mix well. Pour into pan. In small bowl, beat cream cheese, sugar and remaining milk until light and fluffy. Beat in 1 cup grated white chocolate. Drop cream cheese mixture by spoonfuls on top of brownie mixture. Using knife, swirl cream cheese mixture through brownies, going all the way to the bottom of the pan and to the edges. Bake for 35-38 minutes. Remove from oven, cool 15 minutes then sprinkle with remaining 1/4 cup white chocolate. Cool completely before cutting into 24 brownies.